2002 LR Disco 2 - hesitating during acceleration
#1
05-07-2019, 12:48 AM
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2002 LR Disco 2 - hesitating during acceleration
Hi. Just trying to figure out a hestitation with my LR2 disco. Before changing anything I had 15 codes come up ...,
Ive now changed: new spark wires
new coil
new injector o - rings
All 4 o2 sensors
both catalytics
. I did find after pouring water on the intake manifold that it was sucking in water .... either the injectors were loose or plenum gasket. Not sealed . Anyways ... done and running 97% better now idling and running.
But..... still hesitating under load and acceleration. Also doesn’t seem to be shifting into gear smoothly ... like it waits till last minute sometimes.
There are just 2 codes coming up now P0141 and p0140.
Any help would be awesome! I’m getting tired of changing parts out ....
thanks !!!!!
this is a petrol V8
Ive now changed: new spark wires
new coil
new injector o - rings
All 4 o2 sensors
both catalytics
. I did find after pouring water on the intake manifold that it was sucking in water .... either the injectors were loose or plenum gasket. Not sealed . Anyways ... done and running 97% better now idling and running.
But..... still hesitating under load and acceleration. Also doesn’t seem to be shifting into gear smoothly ... like it waits till last minute sometimes.
There are just 2 codes coming up now P0141 and p0140.
Any help would be awesome! I’m getting tired of changing parts out ....
thanks !!!!!
this is a petrol V8
Last edited by Darrin McGillis; 05-07-2019 at 12:51 AM.
#2
05-07-2019, 06:16 AM
TReK
The codes are probably not related to the hesitation..
https://www.innova.com/en-US/Dtc?r=0.1674791229732334
P0140: HO2S S2 CIRCUIT NO ACTIVITY
P0141: HO2S B1 S2 HEATER CIRCUIT MALFUNCTION
It looks like the signal from your downstream O2 sensors are not getting to the ECU.
As far as the hesitation, have you checked fuel pressure?
https://www.innova.com/en-US/Dtc?r=0.1674791229732334
P0140: HO2S S2 CIRCUIT NO ACTIVITY
P0141: HO2S B1 S2 HEATER CIRCUIT MALFUNCTION
It looks like the signal from your downstream O2 sensors are not getting to the ECU.
As far as the hesitation, have you checked fuel pressure?
#3
05-07-2019, 06:33 AM
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#4
05-08-2019, 07:35 AM
TReK
on the driver fuel rail near the rear of the engine you should find a schrader valve.
https://landroverforums.com/forum/di...14/#post417060
https://landroverforums.com/forum/di...14/#post417060
#5
05-13-2019, 10:12 PM
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Replaced the fuel pump and the idle control sensor ....
No codes have come up now. Seems to be idling nicely
but under load accelerating up a hill it still seems to hesitate and be cutting out a bit .
When you stop on it , it will sometimes cut out then it ok.
Doesnt seem to be running at full power.
Not sure where to go from here with no codes.
The only things I haven’t changed are the injectors, crank sensor and camshaft sensor .
No codes have come up now. Seems to be idling nicely
but under load accelerating up a hill it still seems to hesitate and be cutting out a bit .
When you stop on it , it will sometimes cut out then it ok.
Doesnt seem to be running at full power.
Not sure where to go from here with no codes.
The only things I haven’t changed are the injectors, crank sensor and camshaft sensor .
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